Use the proper article. Pay attention to the use of the article with the names of meals.
1. We have ... breakfast at 8. 2. When ... lunch was over they went upstairs to rest a little. 3. We all agreed that it was ... very pleasant dinner. 4. It is not good to smoke before ... breakfast. 5. Nobody objected to ... light supper. 6. At... dinner we sat far from each other and could not talk. 7. All that made ... excellent breakfast. 8. When I came down to ... tea all had already gone. 9. ... dinner was marvellous. 10. She was not sure whether she should order ... supper herself. 11. It all happened at... official luncheon. 12. When ... dinner was over she decided to talk with him. 13. As for ...supper itself it was ... very tasty one. 14. For ... breakfast was bacon and eggs and coffee. 15. We must organize ... little dinner to celebrate the event. 16. If you come half an hour before ... supper you will always find him at home. 17. After ... dinner sit a while, after ... supper walk a mile. 18. That night we had ... lonely little dinner. 19. She came down to ... breakfast. 20. I shall speak to him at... dinner.

1. We have breakfast at 8. 2. When THE lunch was over they went upstairs to rest a little. 3. We all agreed that it was A very pleasant dinner. 4. It is not good to smoke before breakfast. 5. Nobody objected to A light supper. 6. At THE dinner we sat far from each other and could not talk. 7. All that made AN excellent breakfast. 8. When I came down to tea all had already gone. 9. THE dinner was marvellous. 10. She was not sure whether she should order  supper herself. 11. It all happened at AN official luncheon. 12. When THE dinner was over she decided to talk with him. 13. As for supper itself it was A very tasty one. 14. For THE breakfast was bacon and eggs and coffee. 15. We must organize A little dinner to celebrate the event. 16. If you come half an hour before supper you will always find him at home. 17. After dinner sit a while, after  supper walk a mile. 18. That night we had A lonely little dinner. 19. She came down to THE breakfast. 20. I shall speak to him at dinner.